RMagick won't install for me and it's not been updated in over 2 years except for some recent installation bug fixes, which still didn't resolve my issues. It's also really bloated so I think it would be best to switch to MiniMagick
Use MiniMagick instead of RMagick.
I also switched from RMagick to MiniMagick in another project. These seem like pretty sensible changes, thanks!